Mechanical properties and microstructures of cast Ti-Cu alloys
Mechanical properties and microstructures of cast Ti-Cu alloys
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DOI：
10.1016/s0109-5641(02)00027-1
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发表时间：
2003-05-01
期刊：
影响因子：
5
通讯作者：
Okabe, T
中科院分区：
文献类型：
--
作者：
Kikuchi, M;Takada, Y;Okabe, T
目的：评价铸造钛铜合金的力学性能，以期开发出一种力学性能优于非合金钛的牙科铸造用合金。方法：在氩弧熔炼炉中制备含铜量分别为0.5、1.0、2.0、5.0和10.0的Ti-Cu合金。使用离心铸造机将合金铸造到镁基模具中。测定了铸件的显微组织、试样截面显微硬度分布、抗拉强度、屈服强度和伸长率。对拉伸试验后的断口进行了扫描电镜断口分析。对抛光后的试样进行XRD分析。结果采用单因素方差分析和Student-Newman-Keuls检验进行分析。结果：所有铸态Ti- cu合金的平均抗拉强度均显著（p < 0.05）高于铸态纯钛（CP Ti）。在测试的Ti-Cu合金中，5%和10% Cu合金的强度明显高于其他合金。10% Cu合金的平均伸长率最低。CP Ti、0.5%和1% Cu合金具有较高的延展性。除10% Cu合金外，其余铸态Ti-Cu合金的体硬度与CP Ti基本相同。意义：通过与铜的合金化，铸钛变得更强。5% Cu合金的抗拉强度和屈服强度分别比CP Ti提高了30%和40%。延伸率约为3%，与铸态Ti-6Al-4V相似。Ti-Cu合金，如5% Cu合金，如果获得牙科铸件所需的其他性能，可以用于义齿应用。(C) 2003年牙科材料学会。Elsevier Science Ltd.出版。版权所有。
Objectives: This study evaluated the mechanical properties of cast Ti-Cu alloys with the hope of developing an alloy for dental casting with better mechanical properties than unalloyed titanium.Methods: Ti-Cu alloys with five concentrations of copper (0.5, 1.0, 2.0, 5.0 and 10.0 mass%) were made in an argon-arc melting furnace. The alloys were cast into magnesia-based molds using a centrifugal casting machine. The microstructure, microhardness profile of the specimen cross section, tensile strength, yield strength, and elongation were determined for the castings. Scanning electron microscope fractography was undertaken for the fractured surfaces after tensile testing. XRD was performed on the polished specimens. Results were analyzed using one-way ANOVA and the Student-Newman-Keuls tests.Results: The mean tensile strengths of all the cast Ti-Cu alloys were significantly (p < 0.05) higher than for cast commercially pure titanium (CP Ti). Of the Ti-Cu alloys tested, the 5 and 10% Cu alloys had significantly higher strength than the rest. The 10% Cu alloy exhibited the lowest mean elongation. CP Ti and the 0.5 and 1% Cu alloys showed higher ductility. The bulk hardness of all the cast Ti-Cu alloys, except for the 10% Cu alloy, and CP Ti was approximately the same.Significance: By alloying with copper, the cast titanium became stronger. Increases in the tensile strength (30%) and yield strength (40%) over CP Ti were obtained for the 5% Cu alloy. Elongation was approximately 3%, which was similar to cast Ti-6Al-4V. Ti-Cu alloys, such as the 5% Cu alloy, could be used for prosthetic dental applications if other properties necessary for dental castings are obtained. (C) 2003 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.